Actor and activist Ashton Kutcher testified before the Senate Foreign Relations Committee on Wednesday in a bid to educate and end modern slavery. Kutcher testified as a co-founder of Thorn, a tech organization that helps find child abuse victims. (Published Thursday, Feb. 16, 2017)

A Senate committee hearing on a serious topic took a lighthearted turn when Ashton Kutcher blew a kiss at Sen. John McCain .

In the hearing, Kutcher testified before the Senate Foreign Relations Committee on ending modern slavery and human trafficking.

Kutcher was testifying not as an actor, but as the co-founder of Thorn, an organization that uses technology to fight against the sexual exploitation of children. Thorn builds tools that help find child abuse victims and make digital platforms safer.

“For years now, Thorn has been committed to building tech tools to combat child sexual exploitation and facilitating collaborations across tech industry to disrupt these crimes,” Kutcher said in a statement. "We have no intention of stopping until we win this battle."